The present invention provides novel solvate of dexlansoprazole (or R-lansoprazole), particularly diol solvate and its hydrate form of dexlansoprazole (or R-lansoprazole) which is chemically known as (R)-2-[[[3-methyl-4-(2,2,2-trifluoroethoxy)-2-pyridinyl]methyl]sulfinyl]-1H-benzimidazole compound of the formula (I), as well as processes for the preparation thereof. The said solvates are useful in the preparation of dexlansoprazole with enhanced chiral purity and better HPLC purity with less sulphone impurity content.
本发明提供了新型的地塞拉唑(或R-
兰索拉唑)溶剂化物,特别是地塞拉唑(或R-
兰索拉唑)的二醇溶剂化物及其
水合物形式,其
化学名称为(R)-2-[[[3-甲基-4-(2,2,2-三
氟乙氧基)-2-
吡啶基]甲基]亚磺酰基]-1H-
苯并咪唑化合物式(I),以及其制备方法。所述溶剂化物在地塞拉唑的制备中具有增强的手性纯度和更好的高效
液相色谱纯度,同时
硫酮杂质含量更少。